Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b9ec2889a55d01…

MALICIOUS

PDF

79.4 KB Created: 2021-09-11 14:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c10d2380b6c4ada059903e221504a6c2 SHA-1: 2b8623f4c191eb7eaffee289156c4596c9ffba37 SHA-256: 75b9ec2889a55d01a4def6a899d7c0a7865d1d2bd72ff84299012f98091e230f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV. It impersonates a cloud document lure, suggesting it aims to trick users into accessing a shared file. The presence of embedded JavaScript indicates it likely attempts to exploit vulnerabilities or download further malicious content. Multiple unknown URLs were extracted, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://avstralianature.ru/ckfinder/userfiles/files/91027006799.pdf In PDF document text
    • https://sierrainstruments.cn/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/60866391303.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/sedemoxoto.pdfIn PDF document text
    • http://simsoncantho.com/userfiles/file/besokedubonepesego.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/ladoxorekuxubimuzedu.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/zajibejan.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/wuwemofaxagujetunolutona.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/80333051198.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/35512258169.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/jopezonerakigobizalo.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/gadubelilebuvuw.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210901_A977195412F5FB45.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/33860342735.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/eba548053695b37bd9bef6fc35fa9b0f/mudiliw.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/77637943032.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/xibexeberajogigozapiwam.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/dajupa.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/kanupivu.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/nokapewa.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/89929231515.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/1631346526935412047.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091108192533.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/penamagu.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/84880640494.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/tijafuretagideze.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/nusefezakavibaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=market+enabler+appPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A5 10092 bytes
SHA-256: ae4e861b0cb109bfbddf97966646525f10aa05ab94a01f62d175375d29931942
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 16876 bytes
SHA-256: b645037c379bf895e7f46e41f1d6f0772a7390ef2eb8856be760226c190a491c
font_02_sfnt_off0001178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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